11.12.3 Can you answer these questions?

11.12.3.1 How to cite a dataset with biblatex-chicago
11.12.3.2 What is the best practice to declare a tikzpicture as a math symbol?
11.12.3.3 Subheader or ability to designate arbitrary rows as header in tabularray or other?
11.12.3.1 How to cite a dataset with biblatex-chicago

https://tex.stackexchange.com/landing/r/digest?cta=question&id=737435

According to the Chicago Manual of Style a citation of a dataset should look something like this: 
In text: 
Hyde and Marinov (2021) 
In list of references: 
Hyde, Susan D. and Nikolay Marinov. 2021. &... 
[biblatex] [biblatex-chicago] [chicago-style]
 
asked by dufei https://tex.stackexchange.com/landing/r/digest?cta=user&id=149702 Score of 1
11.12.3.2 What is the best practice to declare a tikzpicture as a math symbol?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=737348

My problem is a bit similar to this link, as the following MWE: 
\documentclass{article} 
\usepackage{tikz,amsmath} 
\usetikzlibrary{calc} 
\begin{document} 
\makeatletter 
\def\pgfgetnodeheight(#1)#2{ 
\... 
[tikz-pgf] [math-mode]
 
asked by Explorer https://tex.stackexchange.com/landing/r/digest?cta=user&id=322482 Score of 3
11.12.3.3 Subheader or ability to designate arbitrary rows as header in tabularray or other?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=737452

I'm new to LaTeX and loving tabularray. There's just one thing that I haven't figured out how to do that would be quite useful for my application. I like that I can specify headers in long tables that ... 
[tables] [tabularray] [longtblr]
 
asked by bennynihon https://tex.stackexchange.com/landing/r/digest?cta=user&id=378659 Score of 3